Disk drive data protection system

G - Physics – 06 – F

Patent

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Details

G06F 13/14 (2006.01) G11B 19/04 (2006.01) G11B 20/10 (2006.01) G11B 20/18 (2006.01) G11B 20/12 (2006.01)

Patent

CA 2224452

The present invention provides a method and apparatus for assuring that the desired data is transferred between a variable rate disk drive (31) and a host system during read and write operations. The invention involves retaining a variable amount of data in a buffer memory (38) after the data has been transferred between the buffer memory (38) and a magnetic disk (31) with the variable amount of data retained based upon a predetermined fixed period of time associated with error conditions and a disk transfer rate. If an error condition is detected during a transfer of data between the buffer memory (38) and the disk (31), all of the retained data may be retransferred after the error has been corrected.

L'invention décrit une méthode et un dispositif assurant le transfert de données choisies entre un lecteur de disque à débit variable (31) et un ordinateur central au cours d'opérations de lecture-écriture. L'invention consiste à conserver une quantité variable de données dans une mémoire tampon (38) après le transfert des données entre la mémoire tampon (38) et un disque magnétique (31) et la quantité variable de données gardées est établie en fonction d'une période fixe prédéterminée de temps associée à des cas d'erreur et à une vitesse de transfert. Si des cas d'erreur sont relevés au cours d'un transfert de données entre la mémoire tampon (38) et le disque (31), toutes les données conservées peuvent donc être transférées à nouveau après correction de l'erreur.

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